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https://www.readbyqxmd.com/read/28721100/shear-bond-strength-of-different-surface-treatments-in-bulk-fill-microhybrid-and-nanoparticle-repair-resins
#1
Rudys Rodolfo de Jesus Tavarez, Lauber Jose Dos Santos Almeida Júnior, Tayanne Christine Gomes Guará, Izabella Santos Ribeiro, Etevaldo Matos Maia Filho, Leily Macedo Firoozmand
OBJECTIVES: The purpose of this study was to evaluate the influence of surface treatment and different types of composite resin on the microshear bond strength of repairs. MATERIALS AND METHODS: Seventy-two specimens (n=72) were prepared using a nanoparticle resin and stored in artificial saliva at 37 ± 1°C for 24 h. After this period, the specimens (n=24) were restored with microhybrid resin P60 (3M ESPE), nanoparticle resin Filtek Z350 (3M ESPE), and Bulk Fill Surefil SDR Flow (Dentsply) composite resins...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28688735/implications-of-resin-based-composite-rbc-restoration-on-cuspal-deflection-and-microleakage-score-in-molar-teeth-placement-protocol-and-restorative-material
#2
Lauren E J McHugh, Ioanna Politi, Rami S Al-Fodeh, Garry J P Fleming
OBJECTIVE: To assess the cuspal deflection of standardised large mesio-occluso-distal (MOD) cavities in third molar teeth restored using conventional resin-based composite (RBC) or their bulk fill restorative counterparts compared with the unbound condition using a twin channel deflection measuring gauge. Following thermocycling, the cervical microleakage of the restored teeth was assessed to determine marginal integrity. METHODS: Standardised MOD cavities were prepared in forty-eight sound third molar teeth and randomly allocated to six groups...
July 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28684960/effect-of-mouthwashes-on-solubility-and-sorption-of-restorative-composites
#3
José Pereira Leal, Jaqueline Damasceno da Silva, Rafaelle Fernanda Melão Leal, Carlos da Cunha Oliveira-Júnior, Vera Lúcia Gomes Prado, Glauber Campos Vale
OBJECTIVE: Composites sorption and solubility can be precursors of several chemical and physical processes, which lead to deleterious effects on the polymer structure. This study evaluated the effect of mouthwashes on solubility and sorption of composite resins. MATERIALS AND METHODS: Forty-two specimens of each evaluated composite (Filtek Bulk Fill Flow, Opallis Flow, Durafill VS, and Filtek Z350) were prepared and randomized into seven groups for each solution (mouth rinses with and without alcohol and distilled water) and stored for seven days...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28652817/effect-of-preheating-and-light-curing-unit-on-physicochemical-properties-of-a-bulk-fill-composite
#4
Jéssica Dias Theobaldo, Flávio Henrique Baggio Aguiar, Núbia Inocencya Pavesi Pini, Débora Alves Nunes Leite Lima, Priscila Christiane Suzy Liporoni, Anderson Catelan
OBJECTIVE: The aim of this study is to evaluate the effect of composite preheating and polymerization mode on degree of conversion (DC), microhardness (KHN), plasticization (P), and depth of polymerization (DP) of a bulk fill composite. METHODS: Forty disc-shaped samples (n = 5) of a bulk fill composite were prepared (5 × 4 mm thick) and randomly divided into 4 groups according to light-curing unit (quartz-tungsten-halogen [QTH] or light-emitting diode [LED]) and preheating temperature (23 or 54 °C)...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28652556/characteristics-of-low-polymerization-shrinkage-flowable-resin-composites-in-newly-developed-cavity-base-materials-for-bulk-filling-technique
#5
Keiko Nitta, Rie Nomoto, Yuji Tsubota, Masuji Tsuchikawa, Tohru Hayakawa
The purpose of this study was to evaluate polymerization shrinkage and other physical properties of newly-developed cavity base materials for bulk filling technique, with the brand name BULK BASE (BBS). Polymerization shrinkage was measured according to ISO/FDIS 17304. BBS showed the significantly lowest polymerization shrinkage and significantly higher depth of cure than conventional flowable resin composites (p<0.05). The Knoop hardness, flexural strength and elastic modulus of that were significantly lower than conventional flowable resin composites (p<0...
June 23, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28626204/intrapulpal-temperature-changes-during-curing-of-different-bulk-fill-restorative-materials
#6
Elif Yasa, Cigdem Atalayin, Gamze Karacolak, Tugrul Sari, L Sebnem Turkun
The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded...
June 15, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28605721/dynamic-analysis-of-bulk-fill-composites-effect-of-food-simulating-liquids
#7
Ahmed Hesham Eweis, Adrian U-Jin Yap, Noor Azlin Yahya
This study investigated the effect of food simulating liquids on visco-elastic properties of bulk-fill restoratives using dynamic mechanical analysis. One conventional composite (Filtek Z350 [FZ]), two bulk-fill composites (Filtek Bulk-fill [FB] and Tetric N Ceram [TN]) and a bulk-fill giomer (Beautifil-Bulk Restorative [BB]) were evaluated. Specimens (12 × 2 × 2mm) were fabricated using customized stainless steel molds. The specimens were light-cured, removed from their molds, finished, measured and randomly divided into six groups...
June 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28605610/effect-of-light-curing-exposure-time-shade-and-thickness-on-the-depth-of-cure-of-bulk-fill-composites
#8
A Rodriguez, P Yaman, J Dennison, D Garcia
PURPOSE:   To investigate the effect of different light exposure times, shades, and thicknesses on the depth of cure (DOC) of bulk fill composites. METHODS AND MATERIALS:   Two bulk fill composites, Tetric EvoCeram Bulk Fill (TBF) and Sonic Fill (SF), and a conventional composite, Filtek Supreme Ultra (FSU), were evaluated. Samples (n=10) were made using two different shades (light and dark), thicknesses (2 and 4 mm) and exposure times (20 and 40 seconds). A Tukon 2100B-testing machine was used to obtain three Knoop hardness numbers (KHNs) measured at the top and bottom of each sample, and DOC was calculated as the bottom/top ratio...
June 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28584779/evaluation-of-surface-roughness-of-different-direct-resin-based-composites
#9
Nashaat Mohammed Magdy, Mohammed Zaheer Kola, Hamod Hussain Alqahtani, Mubarak Daghash Alqahtani, Abdullah Saud Alghmlas
AIMS AND OBJECTIVE: To evaluate surface roughness of different resin-based composites. MATERIALS AND METHODS: Three resin composites, one nanohybrid, one nanoceramic, and one bulk-fill resin-based composite, were used in this study. Cylindrical Teflon mold and 8 mm in diameter and 2 mm in thickness disc specimens were prepared. For each composite material, 15 discs were fabricated, with a total of sixty discs were obtained (n = 60). A glass slide 1-2 mm thick was placed over the strip before curing with the light-curing unit to flatten the surfaces...
May 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28583237/intrapulpal-temperature-rise-during-light-activation-of-restorative-composites-in-a-primary-molar
#10
Craig V Vinall, Tales C Garcia-Silva, Jennifer S B Lou, Martha H Wells, Daranee Tantbirojn, Antheunis Versluis
PURPOSE: To investigate intrapulpal temperature rise in a primary molar during light activation of a composite restoration to determine if clinically significant pulpal temperatures (greater than 5.5 degrees Celsius) were reached. METHODS: Restorative composites (EsthetX HD, Filtek Supreme Ultra, Filtek Bulk Fill) were placed into a primary molar with occlusal preparation (1.5 mm depth; remaining pulpal floor thickness one mm). The pulp was extirpated through a root access to place a thermocouple against the pulpal roof...
May 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28581919/thirty-six-month-clinical-comparison-of-bulk-fill-and-nanofill-composite-restorations
#11
A R Yazici, S A Antonson, Z B Kutuk, E Ergin
OBJECTIVES: The aim of this study was to evaluate the clinical performance of a nanofill and a bulk fill resin composite in class II restorations. METHODS AND MATERIALS: In accordance with a split-mouth design, 50 patients received at least one pair of restorations, restored with a nanofill resin composite (Filtek Ultimate [FU]) and with a bulk fill resin composite (Tetric EvoCeram Bulk Fill [TB]). Each restorative resin was used with its respective adhesive system according to the manufacturers' instructions...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28576660/impact-of-light-transmittance-mode-on-polymerisation-kinetics-in-bulk-fill-resin-based-composites
#12
Nicoleta Ilie
OBJECTIVES: to determine the mode of light transmission and its impact on the polymerisation kinetic in modern bulk-fill resin-based composites (B-RBC). MATERIALS AND METHODS: Four low-viscosity methacrylate-based and one high-viscosity ormocer-based B-RBCs were considered. One material was available in three different shades that were all analyzed. Polymerization kinetic and light transmittance were assessed in 2 and 4mm specimen depths. Incident and transmitted irradiance and radiant exposure were measured in real-time on a laboratory-grade spectrometer...
May 30, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28571830/effect-of-bulk-fill-base-material-on-fracture-strength-of-root-filled-teeth-restored-with-laminate-resin-composite-restorations
#13
N A Taha, G A Maghaireh, A S Ghannam, J E Palamara
OBJECTIVES: To evaluate the effect of using a bulk-fill flowable base material on fracture strength and fracture patterns of root-filled maxillary premolars with MOD preparations restored with laminate restorations. METHODS: Fifty extracted maxillary premolars were selected for the study. Standardized MOD cavities with endodontic treatment were prepared for all teeth, except for intact control. The teeth were divided randomly into five groups (n=10); (Group 1) sound teeth, (Group 2) unrestored teeth; (Group 3) MOD cavities with Vitrebond base and resin-based composite (Ceram...
May 29, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28566851/an-in-vitro-evaluation-of-microleakage-associated-with-three-different-compomer-placement-techniques-in-primary-molars
#14
Mohita Gupta, Dinesh Rao, Sapna Hegde
BACKGROUND: Microleakage is one of the most frequently encountered problems in posterior tooth-colored restorations. Efforts to decrease this problem with resin restorations include techniques for reducing the ratio of bonded to unbonded restoration surfaces and following strategic incremental placement techniques to reduce residual stress at tooth-restoration interface which reduces the C-factor, hence microleakage. AIM: The present study aimed to evaluate microleakage associated with three placement techniques for compomer restorations in primary molars...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28535953/genotoxic-potential-of-dental-bulk-fill-resin-composites
#15
Tobias T Tauböck, Danijela Marovic, Davor Zeljezic, Andrea D Steingruber, Thomas Attin, Zrinka Tarle
OBJECTIVE: To investigate both genotoxicity and hardening of bulk-fill composite materials applied in 4-mm layer thickness and photo-activated for different exposure times. METHODS: Three flowable bulk-fill materials and one conventional flowable composite were filled in molds (height: 4mm) and irradiated for 20 or 30s. The top (0mm) and bottom (4mm) specimen surface were mechanically scraped, and eluates (0.01g composite in 1.5ml RPMI 1640 cell culture media) prepared for each material, surface level and irradiation time...
July 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28532050/full-in-vitro-analyses-of-new-generation-bulk-fill-dental-composites-cured-by-halogen-light
#16
Tuçe Hazal Tekin, Aysel Kantürk Figen, Pınar Yılmaz Atalı, Bilge Coşkuner Filiz, Mehmet Burçin Pişkin
The objective of this study was to investigate the full in-vitro analyses of new-generation bulk-fill dental composites cured by halogen light (HLG). Two types' four composites were studied: Surefill SDR (SDR) and Xtra Base (XB) as bulk-fill flowable materials; QuixFill (QF) and XtraFill (XF) as packable bulk-fill materials. Samples were prepared for each analysis and test by applying the same procedure, but with different diameters and thicknesses appropriate to the analysis and test requirements. Thermal properties were determined by thermogravimetric analysis (TG/DTG) and differential scanning calorimetry (DSC) analysis; the Vickers microhardness (VHN) was measured after 1, 7, 15 and 30days of storage in water...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28524243/bulk-filled-posterior-resin-restorations-based-on-stress-decreasing-resin-technology-a-randomized-controlled-6-year-evaluation
#17
Jan W V van Dijken, Ulla Pallesen
This randomized study evaluated a flowable resin composite bulk-fill technique in posterior restorations and compared it intraindividually with a conventional 2-mm resin composite layering technique over a 6-yr follow-up period. Thirty-eight pairs of Class II restorations and 15 pairs of Class I restorations were placed in 38 adults. In all cavities a single-step self-etch adhesive (Xeno V) was applied. In the first cavity of each pair, the flowable resin composite (SDR) was placed, in bulk increments of up to 4 mm...
May 19, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28512178/particulate-generation-mechanisms-during-bulk-filling-and-mitigation-via-new-glass-vial
#18
Christopher Timmons, Chi Yuen Liu, Stefan Merkle
Contamination with foreign particulate matter continues to be a leading cause of parenteral drug recalls, despite extensive control and inspection during manufacturing. Glass is a significant source of particulate matter contamination; however, the mechanism, source, and quantification have not been extensively analyzed. Quantification of particulate matter generation with lab simulations suggests that glass-to-glass contact on the filling line produces large quantities of glass particles of various sizes. A new strengthened glass vial with a low-coefficient of friction (low-COF) surface is proposed to address this root cause of glass particle generation...
May 15, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28510375/the-effect-of-irradiation-distance-on-light-transmittance-and-vickers-hardness-ratio-of-two-bulk-fill-resin-based-composites
#19
Zahra Almuallem, Sinead McDonnell, Antoniella Busuttil-Naudi, Ario Santini
The aims of this study were to assess the light energy transmission and Vickers hardness (VH) ratio of two bulk-fill resin-based composites (RBCs) (Tetric EvoCeram and Filtek) cured at different distances between the light curing unit's (LCU) tip and the surface of the restoration (T-S) using either a Bluephase G2, Bluephase® 'turbo tip' or Bluephase Style LCU. Samples were cured from the top at T-S distances of 2mm, 6mm and 10mm for 20 seconds. A MARC-Resin-Calibrator™ recorded the transmitted irradiance reaching the bottom of the sample, in real time...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28509507/a-practice-based-clinical-evaluation-of-a-bulk-fill-restorative-material
#20
F J Trevor Burke, Russell John Crisp, Ditesh Panchal, Philip Redfearn, Peter Sands
OBJECTIVE: To evaluate the handling, by a group of practice-based researchers, of a recently introduced bulk fill resin-based composite restorative material, Filtek Bulk Fill Restorative (3M ESPE). METHODS: The twelve selected evaluators were sent explanatory letters, a pack of the material under investigation to use for 8 weeks, and a questionnaire. RESULTS: The evaluators rated the ease of use of the bulk fill restorative the same as the previously used posterior composite material...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
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